Understanding The Root Cause of Chronic Headache Source: Medline Plus Chronic headaches and migraines are one of the most common disorder of the nervous system globally. Generally, migraine is a dull ache which develops into a constant throbbing, pulsating pain in your head. In the United States alone, there was 12 percent of the population reported a severe headache or a migraine. It is sixth most disabling illness worldwide, and [Read More]